Disclosed is drug delivery system for effectively administering a drug into a human or animal body tissue. The microjet drug delivery system includes (a) a microjet injector including: a pressure chamber partially sealed by an elastic membrane and containing a pressure-inducing liquid fluid-tightly filled therein; and a drug chamber adjacent to the pressure chamber, wherein the elastic membrane is disposed between the pressure and drug chambers, wherein the drug solution is contained in the drug chamber, wherein the drug chamber has a micro-nozzle partially defined in a wall thereof for ejecting the drug solution out of the drug chamber; (b) a laser generator for generating a laser beam and emitting the laser beam out of the laser generator, wherein the laser generator is configured by irradiating the laser beam into the pressure-inducing liquid in the microjet injector, thereby generating a bubble in the pressure-inducing liquid; and (c) a fractional laser filter module configured for splitting the laser beam incident from the laser generator into a plurality of fractional laser beams, each beam has a reduced diameter, and for irradiating the fractional laser beams. According to the microjet drug delivery system, the pre-ablating of the skin with the fractional laser beams to partially remove the stratum corneum may enable the drug microjet based injection to allow the drug to be effectively invaded into a skin tissue at the portion where the stratum corneum is partially removed and relatively softened.

A single-use needle cover configured to obscure, protect, or hide at least a portion of a needle from view before, during, and/or after an injection and/or aspiration procedure is disclosed. In some embodiments, the cover includes a housing at least partially containing the needle and configured to couple to a syringe, wherein the housing includes an axis and a guide member. In some embodiments, a sleeve has a plurality of tracks configured to slidingly receive the guide member, wherein the sleeve is configured to retract, extend, and rotate with respect to the housing. In some embodiments, after the sleeve has been retracted and extended one time, a first locking member inhibits further retraction of the sleeve and a second locking member inhibits rotation of the sleeve.

A single-use cover assembly that obscures a substantial majority or an entirety of an injection needle from view before, during, and after an injection procedure. The cover assembly includes a housing and a needle sleeve that retracts and extends by sliding axially within the housing. The needle sleeve carries a locking collar that moves from a first position to a second position once the needle sleeve is fully retracted. In the first position the locking collar allows retraction of the needle sleeve from a fully extended position. In the second position, a portion of the locking collar covers a tip of the needle, thereby preventing retraction of the needle sleeve from the fully extended position.

An automatic administration instrument includes a syringe and a partition wall in the syringe which partitions the syringe into different rooms for respectively holding plural kinds of drug solutions or a drug and a drug solution. A partition-wall driver displaces the partition wall and an injection needle is connected to the syringe. A body cap attached to the administration instrument body so as to cover the injection needle. The syringe, the partition wall, and the body cap are configured such that displacing the partition wall dissolves or mixes the drug solutions or the drug and the drug solution in a state that the injection needle is covered by the body cap.

A vibrating anesthesia device with finger cuffs, a pressure switch, and a control unit. The finger cuffs are configured to fit onto the fingers of the user and each may have a vibrator motor positioned adjacent to the fingertip when the finger cuff is worn. The pressure switch is positioned within one of the finger cuffs and is configured to sense a force exerted on the pressure switch. The control unit is configured to attach to the wrist of the user and is electrically coupled to the pressure switch and to each of the vibrator motors. The control unit provides power to the pressure switch, monitors the force exerted on the pressure switch, and turns on each of the vibrator motors when the force exerted on the pressure switch exceeds a threshold value. When turned on, the vibrator motors vibrate and can provide a local anesthetic effect to a patient.

A nerve stimulation system including one or more of an annular frame, an electrically conductive element disposed in the annular frame, and a controller electrically coupled to the electrically conductive element and a power source.

A nerve stimulation system including one or more of an annular frame, an electrically conductive element disposed in the annular frame, and a controller electrically coupled to the electrically conductive element and a power source.

A single-use cover assembly that obscures a substantial majority or an entirety of an injection needle from view before, during, and after an injection procedure. The cover assembly includes a housing and a needle sleeve that retracts and extends by sliding axially within the housing. The needle sleeve carries a locking collar that moves from a first position to a second position once the needle sleeve is fully retracted. In the first position the locking collar allows retraction of the needle sleeve from a fully extended position. In the second position, a portion of the locking collar covers a tip of the needle, thereby preventing retraction of the needle sleeve from the fully extended position.

An injection analgesia system advantageously numbs a patient's skin around an injection site. An injection window guides a caregiver's injection placement to a relatively small area while allowing standard injection procedures to be followed, such as stretching the skin and puncturing the site with a jabbing motion. The injection analgesia system has a needle shield and an analgesia, which are layered together and applied to a skin surface. A needle shield window and a analgesia window align to form the injection window. Advantageously, the needle shield may fold and/or wrap around the injection needle for sharp object protection during and after needle disposal.

An automatic applicator of injection is described, which is equipped with a programmable electronic module that activates a first linear motor (ML1) which axially displaces an arm (13) of the proximal end (11) to the fixed head (20) placed at the distal end of the housing (10), said arm (13) which compresses a cartridge (15) fitted in the chamber (12) formed between the head (20) and the free end of the arm (13) so as to gradually expel the fluid stored in the cartridge; and a second linear motor (ML2) actuated concurrent with the first linear motor (ML1), said second linear motor (ML2) retreating an arm (60) with a dragger (61) which slides axially a suction chamber (30) toward the intermediate portion of the housing (10) and contiguous to the outer surface of the inner chamber (12), gradually exposing the needle tip (50) for application of the injection. The equipment is also equipped with a motor (63) which vibrates the suction chamber (30), tightly sealed, inside which air is removed by a suction pump creating a vacuum for the suction of the mucous against the needle.